Glacial Bosk enters the battlefield tapped unless you sacrifice an artifact land.
: Add to your mana pool. Return Glacial Bosk to its owner's hand.
: Glacial Bosk becomes a 2/1 blue and black Illusion creature until end of turn. It's still a land.
: Add 
to your mana pool. Return Glacial Bosk to its owner's hand.: Glacial Bosk becomes a 2/1 blue and black Illusion creature until end of turn. It's still a land.
